Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR

Kentaro Kitagawa; Naoyuki Katayama; Kenya Ohgushi; Masashi Takigawa

doi:10.1143/JPSJ.78.063706

Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR

Strongly Correlated Electrons 2009-06-10 v3 Superconductivity

Authors: Kentaro Kitagawa , Naoyuki Katayama , Kenya Ohgushi , Masashi Takigawa

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We report results of 75As nuclear magnetic resonance (NMR) experiments on a self-flux grown high-quality single crystal of SrFe2As2. The NMR spectra clearly show sharp first-order antiferromagnetic (AF) and structural transitions occurring simultaneously. The behavior in the vicinity of the transition is compared with our previous study on BaFe2As2. No significant difference was observed in the temperature dependence of the static quantities such as the AF splitting and electric quadrupole splitting. However, the results of the NMR relaxation rate revealed difference in the dynamical spin fluctuations. The stripe-type AF fluctuations in the paramagnetic state appear to be more anisotropic in BaFe2As2 than in SrFe2As2.

Keywords

SrFe2As2 antiferromagnetism nuclear magnetic resonance single crystal spin fluctuations iron-based superconductor

Cite

@article{arxiv.0903.3193,
  title  = {Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR},
  author = {Kentaro Kitagawa and Naoyuki Katayama and Kenya Ohgushi and Masashi Takigawa},
  journal= {arXiv preprint arXiv:0903.3193},
  year   = {2009}
}

Comments

4 pages, 5 figures; discussion revised; accepted for publication in J. Phys. Soc. Jpn

Antiferromagnetism of SrFe2As2 studied by Single-Crystal 75As-NMR

Abstract

Keywords

Cite

Comments

Related papers